Which tunic of an artery is most responsible for maintaining blood pressure and continuous blood circulation? a. tunica externa b. basement membrane c. tunica media d. tunica intima 4 points

C) tunica media  

Explanation:

The middle tunic of an artery is an intermediate layer consisting of elastic fibers, collagen and smooth muscle tissue. It also features an internal limiting elastic membrane separating it from the next layer. The medium tunic is responsible for maintaining blood pressure and continuous blood circulation.

The elasticity of the arteries allows the blood flow inside to remain constant. The loss of elasticity of the middle tunic causes its wall to sag and dilate, causing the aneurysm. This can cause the artery to rupture and lead to fatal bleeding.